I've been trying to use the Arduino nano I recently bought for a school project of mine and found that the reason I couldn't see the port selection tab was that I had not installed the proper drivers. When I went to the page for the driver tutorial and repeated the steps, my computer told me "Windows could not find drivers for your device", despite the fact that I had selected the folder in my arduino ide installation with the drivers.
Any help would be appreciated, hopefully, it's not something that can't be fixed.
Clones often use the CH340 TTL-to-USB converter. You will have to download the driver from the Chinese website and install it. There is also a CH340 article on the Sparkfun website (How to Install CH340 Drivers - SparkFun Learn with a link to the drivers.